Manuscript Summary: This manuscript unites three moral treatises from different epochs. It begins with the mirror for princes by the Dominican William Peraldus, De eruditione principum, written around 1265. This is followed by a short philosophical text by the Franciscan John of Wales, Breviloquium, from the second half of the 13th century, and then a moral treatise by Martin of Braga, Formula vitae honestae, a 6th century work that was widely distributed in the Middle Ages and that was attributed to Seneca for a long time. Intended for the Bishop of Sion Walter Supersaxo (ca. 1402-1482), this manuscript was copied in 1463 by the priest Cristoferus in Domo Lapidea (Im/Zum Steinhaus, Steinhauser) of Lalden (parish of Visp), rector of the altar at the Church of St. Mauritius in Naters (fol. 214v und 220r). The copy was made on paper with a watermark (fol. 180r), also used for S 97 (fol. 129r), one of the three manuscripts, together with S98 and Rcap 73, that were made by the same scribe for the library of Walter Supersaxo. (rou)